本文選題：儲(chǔ)層建模 + 小層劃分�。� 參考：《長(zhǎng)江大學(xué)》2015年碩士論文

【摘要】：研究區(qū)新立油田Ⅳ區(qū)塊地處松遼盆地中央坳陷區(qū),扶余—新木隆起最西端的新立穹隆背斜構(gòu)造上的新立油田中部,開發(fā)面積10.18平方公里,地質(zhì)儲(chǔ)量1036.56萬(wàn)噸,可采儲(chǔ)量為300.62萬(wàn)噸,標(biāo)定采收率29%。屬于低滲透構(gòu)造-巖性油藏的油藏特征,平均滲透率為11.05MD,平均孔隙度14.4%。原始地層壓力12.2MPa,飽和壓力9.6MPa。本次研究的目的層段為下白堊系的泉四段和泉三段上部的扶余、楊大城子油層,儲(chǔ)層以細(xì)砂巖為主,沉積環(huán)境屬于河流—三角洲相沉積。Ⅳ區(qū)塊于1984年全部投入開發(fā),初期采用300米井距正方形反九點(diǎn)法面積注采井網(wǎng),井排方向?yàn)楸睎|67.5度,1997年注采井網(wǎng)調(diào)整為134米線性注水,同時(shí)對(duì)在注水井排的高含水油井轉(zhuǎn)注,2004、2005及2008年進(jìn)一步進(jìn)行井網(wǎng)加密調(diào)整、擴(kuò)邊等。截至到2012年12月,在冊(cè)油水井總數(shù)292口,其中采油井199口,開井136口,年產(chǎn)油4.27萬(wàn)噸,累積產(chǎn)油200.64×104t,采油速度0.41%,采出程度19.36%,可采儲(chǔ)量采出程度66.7%,剩余可采儲(chǔ)量采油速度4.27%,平均綜合含水74.79%。在冊(cè)注水井93口,開井65口,日注水1430 m3,平均單井日注22m3/d,年注水54.2×104m3,累積注水991.16×104m3,月注采比2.49,累積注采比1.93,地下存水率79.5%。Ⅳ區(qū)塊自1984年規(guī)模投產(chǎn)以來(lái),隨著油田不斷地深入開發(fā),目前已進(jìn)入了“高產(chǎn)水、高開采”的階段,嚴(yán)峻的開發(fā)的形勢(shì)已凸顯出來(lái)。而隨著動(dòng)態(tài)、靜態(tài)資料的增加、認(rèn)識(shí)程度的加深,各種開發(fā)中所面對(duì)的問題也隨之涌現(xiàn)出來(lái),所以此刻就要求不斷地對(duì)目前已有的研究成果進(jìn)行調(diào)整和改進(jìn)。同時(shí)由于油田現(xiàn)今油藏的分布情況已極其的復(fù)雜,故此時(shí)就很有必要對(duì)研究區(qū)進(jìn)行三維儲(chǔ)層地質(zhì)建模,通過對(duì)研究區(qū)的孔隙度、滲透率和含油飽和度的研究,來(lái)弄清其中油藏的分布情況,從而能更好地對(duì)油田后期調(diào)整開發(fā)工作起到指導(dǎo),進(jìn)而顯著的提高油田開發(fā)生產(chǎn)的采收率。本文以沉積學(xué)、高分辨率層序地層學(xué)、測(cè)井地質(zhì)學(xué)、地質(zhì)統(tǒng)計(jì)學(xué)等學(xué)科為指導(dǎo),通過觀察研究區(qū)取心井巖心,來(lái)弄清本研究區(qū)的砂體發(fā)育情況、巖心沉積微相類型及發(fā)育規(guī)律和特征。利用精細(xì)的單層劃分與對(duì)比方法,建立起研究區(qū)的精細(xì)地層格架。根據(jù)巖心觀察的結(jié)果來(lái)建立其測(cè)井響應(yīng)模板,通過已建立好的模板來(lái)進(jìn)行全區(qū)單井相的劃分,選取骨干連井剖面進(jìn)行沉積相剖面研究,最終繪制每小層的沉積微相平面圖,以此得出研究區(qū)的沉積演化模式。在上述研究的基礎(chǔ)上,通過建立研究區(qū)的地質(zhì)知識(shí)庫(kù),利用Petrel油藏地質(zhì)建模軟件,建立儲(chǔ)層三維地質(zhì)模型；并且結(jié)合沉積微相研究成果,建立了儲(chǔ)層沉積微相模型；在了解應(yīng)用地質(zhì)統(tǒng)計(jì)學(xué)和隨機(jī)模擬方法的基礎(chǔ)上,對(duì)研究區(qū)建立孔隙度、滲透率及含油飽和度的屬性隨機(jī)模型,建立沉積相控制下的三維屬性地質(zhì)模型,并對(duì)模型進(jìn)行隨機(jī)模型新鉆井檢驗(yàn)。最后結(jié)合后期所做含油飽和度分布圖,來(lái)為油田進(jìn)一步的開發(fā)和挖潛提供有利的地質(zhì)條件。通過對(duì)研究區(qū)的研究工作,該論文取得了以下一些結(jié)論及認(rèn)識(shí)：1、以高分辨率層序地層學(xué)為理論基礎(chǔ),結(jié)合區(qū)域性標(biāo)志層,即一套在研究區(qū)發(fā)育的較純的厚層泥巖段作為標(biāo)志層,進(jìn)行各砂層組的劃分與對(duì)比。再以研究區(qū)內(nèi)取心井為標(biāo)準(zhǔn)井,通過巖心觀察并結(jié)合前人的原劃分方案,來(lái)確定扶楊油層的各分層界限。將研究區(qū)扶楊油層在縱向上分為9個(gè)砂組26個(gè)小層,在小層研究基礎(chǔ)上,將扶楊油層細(xì)分為35個(gè)單層。2、根據(jù)沉積相研究認(rèn)為Ⅳ區(qū)塊扶楊油層發(fā)育水下分流河道、席狀砂、河口壩、河道間漫溢薄層砂、分流河道、決口扇、泛濫平原,間灣等沉積微相,邊灘、河漫灘等沉積微相。3、通過地震資料的綜合解釋得到了砂組層面數(shù)據(jù)和斷層數(shù)據(jù),在結(jié)合小層對(duì)比建立了研究區(qū)的構(gòu)造格架模型,再以沉積微相研究為基礎(chǔ),使用確定性建模的方法建立研究區(qū)的沉積相模型。4、對(duì)Ⅳ區(qū)塊進(jìn)行沉積相控制下的隨機(jī)儲(chǔ)層孔隙度模擬。對(duì)滲透率的模擬,由于滲透率和孔隙度有很好的相關(guān)關(guān)系,于是再利用孔隙度控制模擬滲透率,最后根據(jù)測(cè)井解釋得到的含油面積來(lái)控制模擬含油飽和度的三維模型。這種相控及協(xié)同模擬的方式之下能夠得到更高精度的儲(chǔ)層地質(zhì)模型。5、對(duì)于檢驗(yàn)本工區(qū)隨機(jī)模型的準(zhǔn)確性,本文采取了隨機(jī)新鉆井檢驗(yàn)的方法,通過前后對(duì)比新井剖面與原始剖面的大體一致,僅在井點(diǎn)局部略有差異,說明在此次建模過程中所選擇的建模方法是合理的,所建立的模型的可信性,并有對(duì)研究能起到較好的預(yù)測(cè)性。6、本次儲(chǔ)量計(jì)算采用容積法計(jì)算,得出5、8、9、13、14、16等小層儲(chǔ)量相對(duì)較高,是研究區(qū)的主力油層。通過本次研究,建立了高精度的三維地質(zhì)模型,根據(jù)含油飽和度模擬的分布狀況和儲(chǔ)量的估算,能較好評(píng)價(jià)油藏儲(chǔ)能,對(duì)新立油田Ⅳ區(qū)塊油藏開發(fā)方案今后的調(diào)整和開發(fā)提供重要的地質(zhì)依據(jù)。
[Abstract]:The study area of Xinli oilfield IV block is located in the central depression of Songliao basin area, Fuyu has the most western new Ryuichi Lixin anticline structure of Xinli oilfield development in central area of 10.18 square kilometers, geological reserves of 10 million 365 thousand and 600 tons, recoverable reserves of 3 million 6 thousand and 200 tons, the recovery of 29%. calibration reservoir belongs to low permeability structure lithologic reservoir, the average permeability is 11.05MD, the average porosity of 14.4%. original formation pressure 12.2MPa, saturation pressure 9.6MPa. the purpose of this study is under the layer of the Cretaceous period and the three period of the spring four upper Fuyu, Yangdachengzi reservoir, with fine sandstone, the sedimentary environment belongs to fluvial delta facies IV. Block in 1984 all put into development, the initial 300 meters spacing square inverted nine spot area of injection production pattern, as well as the north east direction row 67.5 degrees, 1997 well network adjustment is 134 meters linear water injection, at the same time In the high water cut wells injection injection wells row, 20042005 in 2008 and further well pattern infilling, edge expansion. As of December 2012, registered a total of 292 wells, the production of 199 wells, open wells 136, the annual output of 42 thousand and 700 tons, the cumulative oil production of 200.64 * 104t, the oil extraction rate of 0.41%, recovery the degree of 19.36%, the recoverable recovery factor of 66.7%, the remaining oil recovery rate of recoverable reserves of 4.27% 74.79%., the average water content in 93 injecting wells, open wells 65, day water 1430 m3, the average single well injection 22m3/d, annual water injection of 54.2 * 104m3, 991.16 * 104m3 month cumulative water injection, the injection production ratio of 2.49 1.93, the cumulative injection production ratio, underground water storage rate 79.5%. IV block since 1984 the scale of production, with the deepening of oilfield development, has entered the "high water, high exploitation stage, severe development situation has been highlighted. And with the increase of the dynamic and static data, Knowledge of the deeper, all facing in the development of problemscome out, so this requires constantly on the current research results has been adjusted and improved. At the same time as the distribution of oil reservoir has been extremely complex today, so it's necessary to perform 3D geological modeling of reservoir in the study area, through the in the research area of porosity, permeability and oil saturation, to find out the distribution of the reservoir, so as to improve the work of oilfield development and adjustment to guide the recovery, and significantly improve the oilfield development and production. This paper based on sedimentology, high-resolution sequence stratigraphy, logging geology, geological statistics and other disciplines as a guide through the observation, the study area core, to understand the development situation of body in the study area of sand microfacies and development regularity of the core and features. By using fine deposition The single layer division and contrast method, establish the fine stratigraphic framework in the study area. According to the core observation results to build the logging response template, through established a good template for the single well facies division, selection of backbone connecting well section of the final section of the sedimentary facies, sedimentary micro drawing of each layer phase plane diagram, as that of depositional evolution mode. On the basis of the above research, through the geological knowledge base is established in the study area, using Petrel reservoir geological modeling software, the establishment of three-dimensional geological model of reservoir sedimentary microfacies; and combined with the research results, established the reservoir sedimentary facies model; based on the understanding of the application geological statistics and stochastic simulation method, establish the porosity in the study area, property of stochastic model of permeability and oil saturation, 3D geological model established under the control of sedimentary facies, and the model The new drilling test. Finally, the stochastic model later made oil saturation distribution, to provide favorable geological conditions for oil field development and potential further. Through the research work in the study area, the paper has made the following conclusions: 1, understanding and using the high resolution sequence stratigraphy theory, combined with the regional flag a layer in the study area developed relatively pure thick mudstone layer as a symbol, the division and correlation of each sand group. In the study area of coring well as standard wells, through core observation combined with the previous primary partition scheme to determine the hierarchical boundaries of Fuyang. The study area of Fuyang reservoir in the longitudinal direction is divided into 9 sand groups 26 small layer based on layer on the Fuyang reservoir is subdivided into 35 single.2, according to the study of sedimentary facies of Fuyang reservoir in block IV that the development of underwater distributary channel, dock Like sand, river mouth bar, overflowing thin sand, distributary channel, crevasse splay, flood plain, bay sedimentary facies, shoal, floodplain sedimentary microfacies such as.3, through the comprehensive interpretation of seismic data obtained sand level data and fault data, in combination with smallcomparedlayer built structure the framework model of the study area, the study of sedimentary microfacies based on sedimentary facies model using the method of deterministic modeling of.4 in the study area, stochastic simulation of reservoir porosity is under the control of IV block deposition. Simulation of permeability, because there is good correlation between permeability and porosity, so the control simulation of three-dimensional model of porosity permeability, finally according to the logging interpretation the oil-bearing area to control the simulation of oil saturation. This phase control and collaborative simulation can get the reservoir geological model.5 with higher accuracy, for inspection The accuracy test in this area of the stochastic model, this paper adopted a method of random inspection of new drilling, by roughly the same contrast before and after the new well section with the original section, only in the local wells is slightly different, the modeling method of choice in the modeling process is reasonable, the credibility of the model, and the the research can play a better prediction of.6, calculated by volumetric method to calculate the reserves, the 5,8,9,13,14,16 layer reserves is relatively high, is the major reservoir of the research area. Through this study, established the three-dimensional geological model of high precision, according to the simulation of oil saturation distribution and reserves, can evaluation of reservoir can provide important geological basis of Xinli oilfield IV reservoir development project adjustment and development in the future.

【學(xué)位授予單位】：長(zhǎng)江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.13

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本文編號(hào)：1760995